前独立悬架设计与系统参数分析
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前独立悬架设计与系统参数分析(中文3500字,英文2400字)
摘 要
本文主要研究轻型汽车前独立悬架的设计分析方法以及轮胎磨损与悬架运动、前轮定位参数的关系。
首先对双横臂独立悬架的各主要组成部件如减振器的选型设计、横向稳定杆的设计校核、扭杆弹簧设计以及对双横臂式和麦弗逊式独立悬架的运动进行了分析,提出了相应的计算方法,编制了一套具有一定实用价值的前独立悬架设计分析软件。并且采用前轮定位仪,进行了实验验证。
论文对双横臂独立悬架参数提出以减小轮胎磨损为优化目标,进行了优化设计。提出了通过优选、调整悬架初始位置状态,以及优化确定转向横拉杆断开点位置的方法,来减小轮胎磨损。同时采用正交实验的方法分析了双横臂独立悬架各结构参数和安装参数对悬架性能和轮胎磨损的影响,确定出最大的影响因素及次要因素。
然后从轮胎模型入手分析前轮定位参数同轮胎磨损的关系。以轮胎磨损能量作为评价指标,选取刷子轮胎模型,对轮胎在稳态纵滑状态下、稳态纵滑侧偏状态下和边界条件下的轮胎磨损进行了分析研究,确定了量化模型。并以轮胎侧偏角为中间变量,建立了前轮定位参数同轮胎磨损之间关系的数学模型,进行了计算机仿真计算。从而可对悬架进行进一步的优化设计,以减小对轮胎磨损的影响,提高车辆的行驶性能和使用经济性。
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关键词:汽车;独立悬架;轮胎磨损;定位参数
Suspension design and the relationship with system parameters
Abstract
The method of independem suspension design is studied in detail andthe relation among suspension movement,front wheel alignment parametersand tyre wear is analysed in this paper.
Firstly,the big indpendent designmethods of main components of double-linksindependent suspension,including shock absorber’choosing,antiroU bar’scalculation,torque bar spring’s design,are presented and movement ofdouble—links indpendent suspension is analysed.So a soRware which isused to design optimal and analyse independent suspension is programmed.Meanwhile,me experiment to Verifythe result is made with the equipment ofthe front wheel alignment.
Then an optimal design t0 mjnimize tyre、vear is perfonlled,whichbrings forward me way to reduce tyre wear throu optimal choosing andmodulating origina ldenpention cture of double-1ink independent suspension andoptimizjng the cut point of track rodill.Futuremore,the memod oformogonal experiment is used to analyse t11e effect that tlle-stn cture a11d fixparameters of double-1ink indendent suspension have on me suspension performance and tyre wear.And the most impotent factor and the second important factor are confiemed. [资料来源:http://Doc163.com]
Key Words:: automobile,independent suspension,tyre wear, alignment paraeter
[资料来源:https://www.doc163.com]